package com.frontop.ao.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.gateway.discovery.DiscoveryClientRouteDefinitionLocator;
import org.springframework.cloud.gateway.discovery.DiscoveryLocatorProperties;
import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.http.codec.support.DefaultServerCodecConfigurer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.cors.reactive.CorsUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;

@SpringBootApplication
@EnableDiscoveryClient
public class FrontopAoGatewayApplication {

    // ----------------------------- 解决跨域 Begin -----------------------------

//    private static final String ALL = "*";
//    private static final String MAX_AGE = "3600L";
//
//    @Bean
//    public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient, DiscoveryLocatorProperties properties) {
//        return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
//    }
//
//    @Bean
//    public ServerCodecConfigurer serverCodecConfigurer() {
//        return new DefaultServerCodecConfigurer();
//    }
//
//    @Bean
//    public WebFilter corsFilter() {
//        return (ServerWebExchange ctx, WebFilterChain chain) -> {
//            ServerHttpRequest request = ctx.getRequest();
//            if (!CorsUtils.isCorsRequest(request)) {
//                return chain.filter(ctx);
//            }
//            HttpHeaders requestHeaders = request.getHeaders();
//            ServerHttpResponse response = ctx.getResponse();
//            HttpMethod requestMethod = requestHeaders.getAccessControlRequestMethod();
//            HttpHeaders headers = response.getHeaders();
//            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, requestHeaders.getOrigin());
//            headers.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, requestHeaders.getAccessControlRequestHeaders());
//
//            if (requestMethod != null) {
//                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, requestMethod.name());
//            }
//            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
//            headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, ALL);
//            headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
//            headers.add("Access-Control-Allow-Headers", "Authorization");
//            headers.add("Access-Control-Allow-Headers", "authorization");
//            headers.add("Access-Control-Allow-Headers", "Content-Type");
//            if (request.getMethod() == HttpMethod.OPTIONS) {
//                response.setStatusCode(HttpStatus.OK);
//                return Mono.empty();
//            }
//            return chain.filter(ctx);
//        };
//    }
    public static void main(String[] args) {
        SpringApplication.run(FrontopAoGatewayApplication.class, args);
        System.out.println("----------------start-success------------------");
    }

}
